METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

In this circuit, the combination meter assembly receives engine speed signals from the ECM via the CAN communication system. The combination meter assembly displays the engine speed calculated based on the data received from the ECM.

WIRING DIAGRAM

A004OS4E01
*1 Combination Meter Assembly
*2 CAN Communication Line

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      CAN communication system DTC is not output. A
      CAN communication system DTC is output. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (TACHOMETER)


    1. Using the GTS, perform the Active Test Click here.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      TachoMeter Operation Tachometer OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000 (rpm) -

      Tech Tips

      Make sure that the vehicle is stopped and the engine is idling.

      OK
      Needle indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING GTS (ENGINE RPM)


    1. Using the GTS, read the Data List Click here.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed / Min.: 0 rpm, Max.: 12750 rpm Actual engine speed -
      OK
      Engine speed displayed on the GTS is almost the same as actual engine speed.

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

  4. READ VALUE USING GTS (ENGINE SPEED)


    1. Using the GTS, read the Data List Click here.

      Engine
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Speed Engine speed / Min.: 0 rpm, Max.: 16383 rpm Actual engine speed -
      Result
      Result Proceed to
      Engine speed displayed on GTS is almost same as actual engine speed. A
      Engine speed displayed on GTS is not same as actual engine speed. (for 1WW) B
      Engine speed displayed on GTS is not same as actual engine speed. (for 2WW) C

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    GO TO ECD SYSTEM Click here

    C

    GO TO ECD SYSTEM Click here